jack up (something)
to raise prices, to raise something with a lifting device
The gas station jacked up their gas prices during the storm.
We jacked up the car so that we could change the tire.
Science Experiments Ideas
Fill a bottle with water and place it upside down and half buried
in soil in a flower box. An air bubble rises up in the bottle from
time to time, showing that the plants are using the water. The
water reservoir is enough for several days, depending on the
number of plants and the weather. Water only flows from the
bottle until the soil round it is soaked. It starts to flow again only
when the plants have drawn so much water from the soil that it becomes dry, and air can enter the
bottle. One notices that plants can take water more easily from loose soil than from hard.